<?php


function sanitiseStringToAlphaNumeric($toxicString)
	{
	$toxicString = str_replace(' ', '-', $toxicString);
	return preg_replace('/[^a-zA-Z0-9-]/s', '', $toxicString);
	}

function transform($xmlString, $xsltPath, $xsltArguments=null)
	{
	if(!file_exists($xsltPath)) die('transform(): path doesn\'t exist at "'.$xsltPath.'"');
	$xslt = new XSLTProcessor;
	$xsltDocument = new DOMDocument();
	$xsltDocument->load($xsltPath);
	$xslt->importStyleSheet($xsltDocument);
	if(is_array($xsltArguments))
		{
		foreach($xsltArguments as $key => $value)
			{
			$xslt->setParameter('', $key, $value);
			}
		}
	$xmlDocument = new DOMDocument();
	$xmlDocument->loadXML($xmlString);
	$result = $xslt->transformToXML($xmlDocument);
	return $result;		
	}

function stringContains($haystack, $needle)
	{
	return strpos($haystack, $needle) !== false;
	}

function stringEndsWith($haystack, $needle)
	{
	//print '['.$haystack.'|'.$needle.'|('.$offset.')'.substr($haystack, $offset).']<hr />';
	return substr($haystack, strlen($haystack) - strlen($needle)) == $needle;
	}

function stringStartsWith($haystack, $needle)
	{
	//print '['.$haystack.'|'.$needle.'|('.$offset.')'.substr($haystack, $offset).']<hr />';
	return substr($haystack, 0, strlen($needle)) == $needle;
	}


class zipfile
	{
	//taken from http://drupal.org/node/83253
	var $datasec      = array();
	var $ctrl_dir     = array();
	var $eof_ctrl_dir = "\x50\x4b\x05\x06\x00\x00\x00\x00";
	var $old_offset   = 0;

	function unix2DosTime($unixtime = 0)
		{
		$timearray = ($unixtime == 0) ? getdate() : getdate($unixtime);
		if ($timearray['year'] < 1980)
			{
			$timearray['year']    = 1980;
			$timearray['mon']     = 1;
			$timearray['mday']    = 1;
			$timearray['hours']   = 0;
			$timearray['minutes'] = 0;
			$timearray['seconds'] = 0;
			}
		return (($timearray['year'] - 1980) << 25) | ($timearray['mon'] << 21) | ($timearray['mday'] << 16) |
		($timearray['hours'] << 11) | ($timearray['minutes'] << 5) | ($timearray['seconds'] >> 1);
		}

	function addFile($data, $name, $time = 0)
		{
		$name     = str_replace('\\', '/', $name);

		$dtime    = dechex($this->unix2DosTime($time));
		$hexdtime = '\x' . $dtime[6] . $dtime[7]
		  . '\x' . $dtime[4] . $dtime[5]
		  . '\x' . $dtime[2] . $dtime[3]
		  . '\x' . $dtime[0] . $dtime[1];
		eval('$hexdtime = "' . $hexdtime . '";');

		$fr   = "\x50\x4b\x03\x04";
		$fr   .= "\x14\x00";            // ver needed to extract
		$fr   .= "\x00\x00";            // gen purpose bit flag
		$fr   .= "\x08\x00";            // compression method
		$fr   .= $hexdtime;             // last mod time and date

		// "local file header" segment
		$unc_len = strlen($data);
		$crc     = crc32($data);
		$zdata   = gzcompress($data);
		$zdata   = substr(substr($zdata, 0, strlen($zdata) - 4), 2); // fix crc bug
		$c_len   = strlen($zdata);
		$fr      .= pack('V', $crc);             // crc32
		$fr      .= pack('V', $c_len);           // compressed filesize
		$fr      .= pack('V', $unc_len);         // uncompressed filesize
		$fr      .= pack('v', strlen($name));    // length of filename
		$fr      .= pack('v', 0);                // extra field length
		$fr      .= $name;

		// "file data" segment
		$fr .= $zdata;

		// "data descriptor" segment (optional but necessary if archive is not
		// served as file)
		// nijel(2004-10-19): this seems not to be needed at all and causes
		// problems in some cases (bug #1037737)
		//$fr .= pack('V', $crc);                 // crc32
		//$fr .= pack('V', $c_len);               // compressed filesize
		//$fr .= pack('V', $unc_len);             // uncompressed filesize

		// add this entry to array
		$this -> datasec[] = $fr;

		// now add to central directory record
		$cdrec = "\x50\x4b\x01\x02";
		$cdrec .= "\x00\x00";                // version made by
		$cdrec .= "\x14\x00";                // version needed to extract
		$cdrec .= "\x00\x00";                // gen purpose bit flag
		$cdrec .= "\x08\x00";                // compression method
		$cdrec .= $hexdtime;                 // last mod time & date
		$cdrec .= pack('V', $crc);           // crc32
		$cdrec .= pack('V', $c_len);         // compressed filesize
		$cdrec .= pack('V', $unc_len);       // uncompressed filesize
		$cdrec .= pack('v', strlen($name) ); // length of filename
		$cdrec .= pack('v', 0 );             // extra field length
		$cdrec .= pack('v', 0 );             // file comment length
		$cdrec .= pack('v', 0 );             // disk number start
		$cdrec .= pack('v', 0 );             // internal file attributes
		$cdrec .= pack('V', 32 );            // external file attributes - 'archive' bit set

		$cdrec .= pack('V', $this -> old_offset ); // relative offset of local header
		$this -> old_offset += strlen($fr);

		$cdrec .= $name;

		// optional extra field, file comment goes here
		// save to central directory
		$this -> ctrl_dir[] = $cdrec;
		}

	function file()
		{
		$data    = implode('', $this -> datasec);
		$ctrldir = implode('', $this -> ctrl_dir);
		return
		$data .
		$ctrldir .
		$this -> eof_ctrl_dir .
		pack('v', sizeof($this -> ctrl_dir)) .  // total # of entries "on this disk"
		pack('v', sizeof($this -> ctrl_dir)) .  // total # of entries overall
		pack('V', strlen($ctrldir)) .           // size of central dir
		pack('V', strlen($data)) .              // offset to start of central dir
		"\x00\x00";                             // .zip file comment length
		}

	}

?>
